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            <div>LEF&#47;DEF 5.8 Language Reference</div>
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      <h2> <a name=""></a><a href="preface.html" title="Preface" name="220756"><font color="#0000ff"><u>Preface</u></font></a></h2>
      <p> <a name=""></a><a href="preface.html#1017612" title="Preface" name="220758"><font color="#0000ff"><u>What's New</u></font></a></p>
      <p> <a name=""></a><a href="preface.html#1013460" title="Preface" name="220760"><font color="#0000ff"><u>Typographic and Syntax Conventions</u></font></a></p>
      <h2><a href="LEFSyntax.html" title="1" name="220762"><font color="#0000ff"><u>1</u></font>
</a></h2>
      <h2> <a name=""></a><a href="LEFSyntax.html#1087299" title="1" name="220764"><font color="#0000ff"><u>LEF Syntax</u></font></a></h2>
      <p> <a name=""></a><a href="LEFSyntax.html#952855" title="1" name="220766"><font color="#0000ff"><u>About Library Exchange Format Files</u></font></a></p>
      <dd> <a name=""></a><a href="LEFSyntax.html#980814" title="1" name="220768"><font color="#0000ff"><u>General Rules</u></font></a></dd>
      <dd> <a name=""></a><a href="LEFSyntax.html#1098095" title="1" name="220770"><font color="#0000ff"><u>Character Information</u></font></a></dd>
      <dd> <a name=""></a><a href="LEFSyntax.html#1098099" title="1" name="220772"><font color="#0000ff"><u>Managing LEF Files</u></font></a></dd>
      <dd> <a name=""></a><a href="LEFSyntax.html#985682" title="1" name="220774"><font color="#0000ff"><u>Order of LEF Statements</u></font></a></dd>
      <p> <a name=""></a><a href="LEFSyntax.html#972773" title="1" name="220776"><font color="#0000ff"><u>LEF Statement Definitions</u></font></a></p>
      <dd> <a name=""></a><a href="LEFSyntax.html#973080" title="1" name="220778"><font color="#0000ff"><u>Bus Bit Characters</u></font></a></dd>
      <dd> <a name=""></a><a href="LEFSyntax.html#996842" title="1" name="220780"><font color="#0000ff"><u>Clearance Measure</u></font></a></dd>
      <dd> <a name=""></a><a href="LEFSyntax.html#973104" title="1" name="220782"><font color="#0000ff"><u>Divider Character</u></font></a></dd>
      <dd> <a name=""></a><a href="LEFSyntax.html#973117" title="1" name="220784"><font color="#0000ff"><u>Extensions</u></font></a></dd>
      <dd> <a name=""></a><a href="LEFSyntax.html#1556430" title="1" name="220786"><font color="#0000ff"><u>FIXEDMASK</u></font></a></dd>
      <dd> <a name=""></a><a href="LEFSyntax.html#1612860" title="1" name="220788"><font color="#0000ff"><u>Layer (Cut)</u></font></a></dd>
      <dd> <a name=""></a><a href="LEFSyntax.html#6031077" title="1" name="220790"><font color="#0000ff"><u>Layer (Implant)</u></font></a></dd>
      <dd> <a name=""></a><a href="LEFSyntax.html#973171" title="1" name="220792"><font color="#0000ff"><u>Layer (Masterslice or Overlap)</u></font></a></dd>
      <dd> <a name=""></a><a href="LEFSyntax.html#3007876" title="1" name="220794"><font color="#0000ff"><u>Layer (Routing)</u></font></a></dd>
      <dd> <a name=""></a><a href="LEFSyntax.html#5524143" title="1" name="220796"><font color="#0000ff"><u>Library</u></font></a></dd>
      <dd> <a name=""></a><a href="LEFSyntax.html#5528374" title="1" name="220798"><font color="#0000ff"><u>Macro</u></font></a></dd>
      <dd> <a name=""></a><a href="LEFSyntax.html#3907593" title="1" name="220800"><font color="#0000ff"><u>Manufacturing Grid</u></font></a></dd>
      <dd> <a name=""></a><a href="LEFSyntax.html#983165" title="1" name="220802"><font color="#0000ff"><u>Maximum Via Stack</u></font></a></dd>
      <dd> <a name=""></a><a href="LEFSyntax.html#973885" title="1" name="220804"><font color="#0000ff"><u>Nondefault Rule</u></font></a></dd>
      <dd> <a name=""></a><a href="LEFSyntax.html#973817" title="1" name="220806"><font color="#0000ff"><u>Property Definitions</u></font></a></dd>
      <dd> <a name=""></a><a href="LEFSyntax.html#973919" title="1" name="220808"><font color="#0000ff"><u>Site</u></font></a></dd>
      <dd> <a name=""></a><a href="LEFSyntax.html#973939" title="1" name="220810"><font color="#0000ff"><u>Units</u></font></a></dd>
      <dd> <a name=""></a><a href="LEFSyntax.html#974095" title="1" name="220812"><font color="#0000ff"><u>Use Min Spacing</u></font></a></dd>
      <dd> <a name=""></a><a href="LEFSyntax.html#972738" title="1" name="220814"><font color="#0000ff"><u>Version</u></font></a></dd>
      <dd> <a name=""></a><a href="LEFSyntax.html#918957" title="1" name="220816"><font color="#0000ff"><u>Via</u></font></a></dd>
      <dd> <a name=""></a><a href="LEFSyntax.html#1561216" title="1" name="220818"><font color="#0000ff"><u>Via Rule</u></font></a></dd>
      <dd> <a name=""></a><a href="LEFSyntax.html#955165" title="1" name="220820"><font color="#0000ff"><u>Via Rule Generate</u></font></a></dd>
      <h2><a href="DEFINEandALIAS.html" title="2" name="220822"><font color="#0000ff"><u>2</u></font>
</a></h2>
      <h2> <a name=""></a><a href="DEFINEandALIAS.html#919793" title="2" name="220824"><font color="#0000ff"><u>ALIAS Statements</u></font></a></h2>
      <p> <a name=""></a><a href="DEFINEandALIAS.html#918778" title="2" name="220826"><font color="#0000ff"><u>ALIAS Statements</u></font></a></p>
      <dd> <a name=""></a><a href="DEFINEandALIAS.html#918790" title="2" name="220828"><font color="#0000ff"><u>ALIAS Definition</u></font></a></dd>
      <dd> <a name=""></a><a href="DEFINEandALIAS.html#918797" title="2" name="220830"><font color="#0000ff"><u>ALIAS Examples</u></font></a></dd>
      <dd> <a name=""></a><a href="DEFINEandALIAS.html#918818" title="2" name="220832"><font color="#0000ff"><u>ALIAS Expansion</u></font></a></dd>
      <h2><a href="WorkingwithLEF.html" title="3" name="220834"><font color="#0000ff"><u>3</u></font>
</a></h2>
      <h2> <a name=""></a><a href="WorkingwithLEF.html#922000" title="3" name="220836"><font color="#0000ff"><u>Working with LEF</u></font></a></h2>
      <p> <a name=""></a><a href="WorkingwithLEF.html#918646" title="3" name="220838"><font color="#0000ff"><u>Incremental LEF</u></font></a></p>
      <p> <a name=""></a><a href="WorkingwithLEF.html#918868" title="3" name="220840"><font color="#0000ff"><u>Error Checking</u></font></a></p>
      <dd> <a name=""></a><a href="WorkingwithLEF.html#918885" title="3" name="220842"><font color="#0000ff"><u>Message Facility</u></font></a></dd>
      <dd> <a name=""></a><a href="WorkingwithLEF.html#918911" title="3" name="220844"><font color="#0000ff"><u>Error&#45;Checking Facility</u></font></a></dd>
      <h2><a href="DEFSyntax.html" title="4" name="220846"><font color="#0000ff"><u>4</u></font>
</a></h2>
      <h2> <a name=""></a><a href="DEFSyntax.html#948406" title="4" name="220848"><font color="#0000ff"><u>DEF Syntax</u></font></a></h2>
      <p> <a name=""></a><a href="DEFSyntax.html#918666" title="4" name="220850"><font color="#0000ff"><u>About Design Exchange Format Files</u></font></a></p>
      <dd> <a name=""></a><a href="DEFSyntax.html#968594" title="4" name="220852"><font color="#0000ff"><u>General Rules</u></font></a></dd>
      <dd> <a name=""></a><a href="DEFSyntax.html#1030241" title="4" name="220854"><font color="#0000ff"><u>Character Information</u></font></a></dd>
      <dd> <a name=""></a><a href="DEFSyntax.html#968584" title="4" name="220856"><font color="#0000ff"><u>Order of DEF Statements</u></font></a></dd>
      <p> <a name=""></a><a href="DEFSyntax.html#962034" title="4" name="220858"><font color="#0000ff"><u>DEF Statement Definitions</u></font></a></p>
      <dd> <a name=""></a><a href="DEFSyntax.html#960607" title="4" name="220860"><font color="#0000ff"><u>Blockages</u></font></a></dd>
      <dd> <a name=""></a><a href="DEFSyntax.html#960625" title="4" name="220862"><font color="#0000ff"><u>Bus Bit Characters</u></font></a></dd>
      <dd> <a name=""></a><a href="DEFSyntax.html#994799" title="4" name="220864"><font color="#0000ff"><u>Component Mask Shift</u></font></a></dd>
      <dd> <a name=""></a><a href="DEFSyntax.html#964281" title="4" name="220866"><font color="#0000ff"><u>Components</u></font></a></dd>
      <dd> <a name=""></a><a href="DEFSyntax.html#960855" title="4" name="220868"><font color="#0000ff"><u>Design</u></font></a></dd>
      <dd> <a name=""></a><a href="DEFSyntax.html#960864" title="4" name="220870"><font color="#0000ff"><u>Die Area</u></font></a></dd>
      <dd> <a name=""></a><a href="DEFSyntax.html#960874" title="4" name="220872"><font color="#0000ff"><u>Divider Character</u></font></a></dd>
      <dd> <a name=""></a><a href="DEFSyntax.html#960885" title="4" name="220874"><font color="#0000ff"><u>Extensions</u></font></a></dd>
      <dd> <a name=""></a><a href="DEFSyntax.html#960898" title="4" name="220876"><font color="#0000ff"><u>Fills</u></font></a></dd>
      <dd> <a name=""></a><a href="DEFSyntax.html#960924" title="4" name="220878"><font color="#0000ff"><u>GCell Grid</u></font></a></dd>
      <dd> <a name=""></a><a href="DEFSyntax.html#960954" title="4" name="220880"><font color="#0000ff"><u>Groups</u></font></a></dd>
      <dd> <a name=""></a><a href="DEFSyntax.html#960989" title="4" name="220882"><font color="#0000ff"><u>History</u></font></a></dd>
      <dd> <a name=""></a><a href="DEFSyntax.html#961007" title="4" name="220884"><font color="#0000ff"><u>Nets</u></font></a></dd>
      <dd> <a name=""></a><a href="DEFSyntax.html#972088" title="4" name="220886"><font color="#0000ff"><u>Nondefault Rules</u></font></a></dd>
      <dd> <a name=""></a><a href="DEFSyntax.html#961235" title="4" name="220888"><font color="#0000ff"><u>Pins</u></font></a></dd>
      <dd> <a name=""></a><a href="DEFSyntax.html#961400" title="4" name="220890"><font color="#0000ff"><u>Pin Properties</u></font></a></dd>
      <dd> <a name=""></a><a href="DEFSyntax.html#974308" title="4" name="220892"><font color="#0000ff"><u>Property Definitions</u></font></a></dd>
      <dd> <a name=""></a><a href="DEFSyntax.html#961487" title="4" name="220894"><font color="#0000ff"><u>Regions</u></font></a></dd>
      <dd> <a name=""></a><a href="DEFSyntax.html#961504" title="4" name="220896"><font color="#0000ff"><u>Rows</u></font></a></dd>
      <dd> <a name=""></a><a href="DEFSyntax.html#961518" title="4" name="220898"><font color="#0000ff"><u>Scan Chains</u></font></a></dd>
      <dd> <a name=""></a><a href="DEFSyntax.html#961557" title="4" name="220900"><font color="#0000ff"><u>Slots</u></font></a></dd>
      <dd> <a name=""></a><a href="DEFSyntax.html#961647" title="4" name="220902"><font color="#0000ff"><u>Special Nets</u></font></a></dd>
      <dd> <a name=""></a><a href="DEFSyntax.html#972676" title="4" name="220904"><font color="#0000ff"><u>Styles</u></font></a></dd>
      <dd> <a name=""></a><a href="DEFSyntax.html#961856" title="4" name="220906"><font color="#0000ff"><u>Technology</u></font></a></dd>
      <dd> <a name=""></a><a href="DEFSyntax.html#961865" title="4" name="220908"><font color="#0000ff"><u>Tracks</u></font></a></dd>
      <dd> <a name=""></a><a href="DEFSyntax.html#961877" title="4" name="220910"><font color="#0000ff"><u>Units</u></font></a></dd>
      <dd> <a name=""></a><a href="DEFSyntax.html#947809" title="4" name="220912"><font color="#0000ff"><u>Version</u></font></a></dd>
      <dd> <a name=""></a><a href="DEFSyntax.html#950441" title="4" name="220914"><font color="#0000ff"><u>Vias</u></font></a></dd>
      <h2><a href="Examples.html" title="A" name="220916"><font color="#0000ff"><u>A</u></font>
</a></h2>
      <h2> <a name=""></a><a href="Examples.html#920628" title="A" name="220918"><font color="#0000ff"><u>Examples</u></font></a></h2>
      <p> <a name=""></a><a href="Examples.html#918644" title="A" name="220920"><font color="#0000ff"><u>LEF</u></font></a></p>
      <p> <a name=""></a><a href="Examples.html#918664" title="A" name="220922"><font color="#0000ff"><u>DEF</u></font></a></p>
      <p> <a name=""></a><a href="Examples.html#918708" title="A" name="220924"><font color="#0000ff"><u>Scan Chain Synthesis Example</u></font></a></p>
      <h2><a href="OptimizingLEFTechnology.html" title="B" name="220926"><font color="#0000ff"><u>B</u></font>
</a></h2>
      <h2> <a name=""></a><a href="OptimizingLEFTechnology.html#1031927" title="B" name="220928"><font color="#0000ff"><u>Optimizing LEF Technology for Place and Route</u></font></a></h2>
      <p> <a name=""></a><a href="OptimizingLEFTechnology.html#1031962" title="B" name="220930"><font color="#0000ff"><u>Overview</u></font></a></p>
      <p> <a name=""></a><a href="OptimizingLEFTechnology.html#1031996" title="B" name="220932"><font color="#0000ff"><u>Guidelines for Routing Pitch</u></font></a></p>
      <p> <a name=""></a><a href="OptimizingLEFTechnology.html#1032229" title="B" name="220934"><font color="#0000ff"><u>Guidelines for Wide Metal Spacing</u></font></a></p>
      <p> <a name=""></a><a href="OptimizingLEFTechnology.html#1032245" title="B" name="220936"><font color="#0000ff"><u>Guidelines for Wire Extension at Vias</u></font></a></p>
      <p> <a name=""></a><a href="OptimizingLEFTechnology.html#1032644" title="B" name="220938"><font color="#0000ff"><u>Guidelines for Default Vias</u></font></a></p>
      <p> <a name=""></a><a href="OptimizingLEFTechnology.html#1033035" title="B" name="220940"><font color="#0000ff"><u>Guidelines for Stack Vias (MAR Vias) and Samenet Spacing</u></font></a></p>
      <p> <a name=""></a><a href="OptimizingLEFTechnology.html#1033558" title="B" name="220942"><font color="#0000ff"><u>Example of an Optimized LEF Technology File</u></font></a></p>
      <h2><a href="PAE.html" title="C" name="220944"><font color="#0000ff"><u>C</u></font>
</a></h2>
      <h2> <a name=""></a><a href="PAE.html#1033512" title="C" name="220946"><font color="#0000ff"><u>Calculating and Fixing Process Antenna Violations</u></font></a></h2>
      <p> <a name=""></a><a href="PAE.html#1034563" title="C" name="220948"><font color="#0000ff"><u>Overview</u></font></a></p>
      <dd> <a name=""></a><a href="PAE.html#1034595" title="C" name="220950"><font color="#0000ff"><u>What Are Process Antennas?</u></font></a></dd>
      <dd> <a name=""></a><a href="PAE.html#1034685" title="C" name="220952"><font color="#0000ff"><u>What Is the Process Antenna Effect (PAE)?</u></font></a></dd>
      <dd> <a name=""></a><a href="PAE.html#1034691" title="C" name="220954"><font color="#0000ff"><u>What Is the Antenna Ratio?</u></font></a></dd>
      <dd> <a name=""></a><a href="PAE.html#1034778" title="C" name="220956"><font color="#0000ff"><u>What Can Be Done to Improve the Antenna Ratio?</u></font></a></dd>
      <p> <a name=""></a><a href="PAE.html#1034861" title="C" name="220958"><font color="#0000ff"><u>Using Process Antenna Keywords in the LEF and DEF Files</u></font></a></p>
      <p> <a name=""></a><a href="PAE.html#1034900" title="C" name="220960"><font color="#0000ff"><u>Calculating Antenna Ratios</u></font></a></p>
      <dd> <a name=""></a><a href="PAE.html#1039567" title="C" name="220962"><font color="#0000ff"><u>Calculating the Antenna Area</u></font></a></dd>
      <dd> <a name=""></a><a href="PAE.html#1034939" title="C" name="220964"><font color="#0000ff"><u>Calculating a PAR</u></font></a></dd>
      <dd> <a name=""></a><a href="PAE.html#1035362" title="C" name="220966"><font color="#0000ff"><u>Calculating a CAR</u></font></a></dd>
      <dd> <a name=""></a><a href="PAE.html#1036143" title="C" name="220968"><font color="#0000ff"><u>Calculating Ratios for a Cut Layer</u></font></a></dd>
      <p> <a name=""></a><a href="PAE.html#1036523" title="C" name="220970"><font color="#0000ff"><u>Checking for Antenna Violations</u></font></a></p>
      <dd> <a name=""></a><a href="PAE.html#1036542" title="C" name="220972"><font color="#0000ff"><u>Area Ratio Check</u></font></a></dd>
      <dd> <a name=""></a><a href="PAE.html#1036566" title="C" name="220974"><font color="#0000ff"><u>Side Area Ratio Check</u></font></a></dd>
      <dd> <a name=""></a><a href="PAE.html#1036590" title="C" name="220976"><font color="#0000ff"><u>Cumulative Area Ratio Check</u></font></a></dd>
      <dd> <a name=""></a><a href="PAE.html#1036600" title="C" name="220978"><font color="#0000ff"><u>Cumulative Side Area Ratio Check</u></font></a></dd>
      <dd> <a name=""></a><a href="PAE.html#1040341" title="C" name="220980"><font color="#0000ff"><u>Cut Layer Process Antenna Model Examples</u></font></a></dd>
      <dd> <a name=""></a><a href="PAE.html#1040085" title="C" name="220982"><font color="#0000ff"><u>Routing Layer Process Antenna Model Examples</u></font></a></dd>
      <dd> <a name=""></a><a href="PAE.html#1038786" title="C" name="220984"><font color="#0000ff"><u>Example Using the Antenna Keywords</u></font></a></dd>
      <p> <a name=""></a><a href="PAE.html#1036656" title="C" name="220986"><font color="#0000ff"><u>Using Antenna Diode Cells</u></font></a></p>
      <dd> <a name=""></a><a href="PAE.html#1036661" title="C" name="220988"><font color="#0000ff"><u>Changing the Routing</u></font></a></dd>
      <dd> <a name=""></a><a href="PAE.html#1036670" title="C" name="220990"><font color="#0000ff"><u>Inserting Antenna Diode Cells</u></font></a></dd>
      <p> <a name=""></a><a href="PAE.html#1036735" title="C" name="220992"><font color="#0000ff"><u>Using DiffUseOnly</u></font></a></p>
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